Multiple independent variants at the TERT locus are associated with telomere length and risks of breast and ovarian cancer

  • S.E. B
  • K.A. P
  • S.E. J
  • et al.
ISSN: 1061-4036
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Abstract

TERT-locus SNPs and leukocyte telomere measures are reportedly associated with risks of multiple cancers. Using the Illumina custom genotyping array iCOGs, we analyzed ~480 SNPs at the TERT locus in breast (n = 103,991), ovarian (n = 39,774) and BRCA1 mutation carrier (n = 11,705) cancer cases and controls. Leukocyte telomere measurements were also available for 53,724 participants. Most associations cluster into three independent peaks. The minor allele at the peak 1 SNP rs2736108 associates with longer telomeres (P = 5.8 null 10 -7), lower risks for estrogen receptor (ER)-negative (P = 1.0 null 10 -8) and BRCA1 mutation carrier (P = 1.1 null 10 -5) breast cancers and altered promoter assay signal. The minor allele at the peak 2 SNP rs7705526 associates with longer telomeres (P = 2.3 null 10 -14), higher risk of low-malignant-potential ovarian cancer (P = 1.3 null 10 -15) and greater promoter activity. The minor alleles at the peak 3 SNPs rs10069690 and rs2242652 increase ER-negative (P = 1.2 null 10 -12) and BRCA1 mutation carrier (P = 1.6 null 10 -14) breast and invasive ovarian (P = 1.3 null 10 -11) cancer risks but not via altered telomere length. The cancer risk alleles of rs2242652 and rs10069690, respectively, increase silencing and generate a truncated TERT splice variant.

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S.E., B., K.A., P., S.E., J., J., B. B. B. B., K., M. M. M., J.P., T., … A.M., D. (2013). Multiple independent variants at the TERT locus are associated with telomere length and risks of breast and ovarian cancer. Nature Genetics.

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